ACS replicate uncertainty calculator
Calculate a design-specific standard error from the full estimate and 80 aligned replicate statistics.
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Use ordinary supported estimates in the same units. Enter the already-derived statistic, not raw replicate weights.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Standard error
- 2
- Approximate 90% margin
- 3.29
- Interpretation
- Sampling variation only; use the units of the entered statistic.
How to interpret the output
Variance = (4/80) times the sum of squared deviations from the full estimate; approximate 90% margin = 1.645 × SE. Controlled estimates, zero-count adjustments and unavailable replicates require separate handling. Source checked 7 November 2026.
Method reference